But even though the cute primate is more than a month old, staff still cannot say whether the infant is male or female.

Curator Julie Mansell said: “For the first few weeks after birth, crowned sifaka babies hold on to their mother’s stomach and, for that reason, keepers have not yet been able to determine the sex, or the name, of the infant.”

The lemur was born in November to mother Linoa and father Tilavo as part of a successful breeding programme.

Belfast Zoo added it is home to one of only two breeding pairs in Europe.

Mummy and her wee baby adjust in Belfast Zoo

Ms Mansell said: “In 2008 we were the first zoo in the British Isles to breed crowned sifaka.

“This success has continued ever since and the birth of our latest arrival is a massive cause for celebration.”

The crowned sifaka is a species of lemur normally found on the Indian Ocean island of Madagascar.

Ms Mansell said the country is home to more than 250,000 species, 70% of which are found nowhere else in the world.

But she added: “More than 80% of the forests have disappeared since the 1950s, leaving sifakas and other irreplaceable species in danger of extinction.

“It is therefore imperative that zoos play an active role in the conservation of this remarkable species.”